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Given the following relation, please list 3 super keys. begin{tabular}{|c|c|c|c|c|c|} hline Roll_No & Name & Ph_No & Course & Email & Address hline 1

Given the following relation, please list 3 super keys.

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\begin{tabular}{|c|c|c|c|c|c|} \hline Roll_No & Name & Ph_No & Course & Email & Address \\ \hline 1 & Prashant & 1234567890 & MCA & pra@gmail.com & Mumbai \\ \hline 2 & Vipul & 0987654321 & BCA & vip@gmail.com & Delhi \\ \hline 3 & Rohit & 5432167890 & MCA & Roh@gmail.com & Punjab \\ \hline 4 & Prashant & 4321567890 & B.tech & pr1@gmail.com & Mumbai \\ \hline 5 & Rohit & 3214567890 & MCA & Ro2@gmail.com & Mumbai \\ \hline \end{tabular}

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